The human body limit
• Most people spend about a third of their lives asleep.
• The heart beats about 70 times a minute. That is nearly 37 million times a year!
• The longest and strongest bone in the body is the femur, or thigh bone.
• There are about 650 muscles in the human body.
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• There are four basic blood groups found throughout the world. They are called A, AB, B and O Group O is the most common.
•some people have such good colour vision that they can tell the difference between as many as 300,000 different shades of colour.
• The human ear can pick out more than 1500 different musical tones.
• It is impossible to sneeze with your eyes 👀 open ! .
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